Ricoh D025 Service Manual page 488

SC Tables
No. Type
Heating roller warm-up error 1
542 A
1.
2.
3.
4.
D023/D025
Details (Symptom, Possible Cause, Troubleshooting Procedures)
After the main switch is turned on or the cover is closed, the
increment of the heating roller temperature per 10 seconds is 30°C
or less. If this condition is detected five times consecutively, SC
542 is defined.
The heating roller temperature does not reach 100°C for 15
seconds after the heating lamp on.
The heating roller temperature does not reach the ready
temperature while 60 seconds after the heating lamp on.
The center temperature of the heating roller does not reach the
ready temperature for 30 seconds after the both edge temperature
of the heating roller has reached the ready temperature.
Dirty or defective thermopile
Defective thermistor
Defective heating roller lamp
Check if the heating roller thermistor is firmly connected.
Replace the thermistor.
Check or replace the thermopile.
Replace the heating roller lamp.
3-36 SM Appendix